BMW E46 318ci 1895cc (2000) Error: P0170 Check Fuel Supply System

BMW Unmetered Air Leaks P0170 P0173 Mixture Too Lean ...

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www.youtube.com/watch?v=Eso0dgmymhYJan 2, 2013 - Uploaded by AskTheCarExperts BMW Unmetered Air Leaks P0170 P0173 Mixture Too Lean Smoke ... a lot thank you , damn boot was giving me so much problems and codes.

P0173 Fuel Trim Malfunction (Bank 2) - OBD Codes

www.obd-codes.com/p0173
Detailed information on troubleshooting and repairing a P0173 DTC code which refers to a fuel trim malfunction on Bank 2. Also includes links to relevant forum ...

Here's a link for the causes for the code P0170. P0170 Fuel Trim Malfunction Bank 1

There is no one fix works on this O2 sensor code
P0170 - Fuel Trim Malfunction Bank 1
Possible causes- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection

P0304 = #4 cylinder misfires
P0170 = Fuel Trim, Bank-1
P0173 = Fuel Trim, Bank-2
P1250 = this is invalid code for BMW
P1188 = Fuel control, bank-1, sensor-1 (pre-cat sensor)
P1189 = Fuel control, bank-2, sensor-1 (pre-cat sensor)
Vacuum leaks and/or sensor defective for the issues of the codes.
This error codes really need parts to replace. But you have to replace the thermostat first. Then clear the codes and see if any reappears,then replace defective part/s

Your fuel system is either to rich or to lean.I would check the fuel pressure first and if its to rich it could be a faulty regulator, or intake manifold leak or if its to lean it could be a weak fuel pump,clogged fuel filter or dirty fuel injectors.

Go to bimmerforums.com

SAE Code P1188 DTC Code 17596 Description Linear 02 Sensor / Compensator Resistor Short to ground SAE Code P1189 DTC Code 17597 Description Linear 02 Sensor / Compensator Resistor Short to B+ SAE Code P0170 DTC Code 16554 Description Fuel Trim, Bank1 Malfunction

Basically you need a new oxygen sensor, The fuel trim code is from the computer trying to adjust the fuel/Air mixture to compensate for the bad signal from the sensor. Just change the one closer to the engine, the one behind the Catalytic converter will thow a different code when it fails.

171 check, fuel supply system short circuit to b+